Improvement in book-binding



.UNITED STATES PATENT OFFICE.

AZOR HOYT, OF BROOKLYN, AND nOwARD'M. HOYT, OF NEW'YORK, N. Y., sAID AZOR Herr AssIGNoR rro SAID HOWARD M. HOYT.

iMPRovEMi-INT IN BooK-BINDING.

Specification forming part of Letters Patent No. 175,707, dated April 4., 1876; application filed February 15, 1876.

' clear, and exact description of the same, reference being had to the annexed drawing and letters of reference marked thereon, forming apart of this specieution.

The object of our invention is the securing of greater' durability in the binding of books and other similar matter. lt consists of a back ot' metal or other inflexible material pressed on the back edges ot' the matter to be bound, and held in place by clamped edges overlappingthe ends ot' curved pins, w rich are inserted in and through the matter." o be hound, at such distances from the ed re/ot' the baci; margin, and in such number, as the character' of the work may requhe, .These pins, thus inserted, are in lieu ot' the sewing or stitching ordinarily done in the process ot' book-binding. They are curved for the purpose ot' enabling the book to open well on its hack margin, the curving of the pins effect-ing the same result as is Obtained by what is known as spring-.back binding. Ai'ter the matter to be bound is fastened together by means of these curved pins, 'the back, made of metal or other iniiexible material, is pressed on, and then with the side boards, as in ordinary book-binding, covered with leather, paper, muslin, or other suitable material, and iinishcd by any of the ordinary methods.

In the accompanying drawing, the shape and form ot' the back are shown in Figure l. The form of the pins is shown in Figs. 2 and 3, and the two in combination in Fig. 3.

These pins thus inserted are composed of pieces of wire of curved term, with convex facing the front margin, and concave facing the back margin, of the matter vin process of binding.

The pins may be used in separate pieces,

as shown, Figs. 2 and 3, or they may be connected at the ends by strips of wire, as shown,

Fig. 4. Strips ot' metal similarly formed may be used as a substitute for the wire pin, but we prefer the use ot the wire pin as described. The pins thus described are used in lieu of the sewing or stitching or fasteningordinarily done in the process of book-binding.

The iniexible curve formed'in the back margin ofthe book for the purpose as described, may be t'ormed otherwise than by the use ot' the pins, but we prefer the use ot' the pins.

The advantages ot' our invention over any other method now in use are, tirst, that the book is stronger and more durable. The back and the pins will resist the severest use. Second, the cost ot' production is less, from the fact that less timel is required to manufacture by this method, and the process is so simple as to be easily performed by unskilled labor. 

